The default spacing settings for Math objects should be set to zero as default value. Users that frequently write mathematical equations withing text sentences need to manually set the "Formula" style to have zero spacing to both sides. Also, on the Math Editor the users have to set the spacing to zero on both sides.

Many people simple do not know how to do this (it took me a while to learn) and they think that LO can't handle equations well because of this default setting that does not make much sense.

I would recommend change all spacing for Formulas to zero. This needs to be done in two places:

1) On the Styles defined for Formulas

2) On the Math Editor (Format -> Spacing -> Borders) set Left and Right to zero as default.

This is the behavior that new users will expect, because this is how equations are handled in all major office suites.